Mounting for curved building boards for producing concrete ceilings



April 23, 1954 w. ZIMMERSCHIED ETAL 3, 7

MOUNTING FOR CURYED BUILDING BOARDS FOR PRODUCING CONCRETE CEILINGS 2 Sheets-Sheet 1 Filed Nov. 28, 1961 United States Patent 3,130,471 M-OUN'I lNG FOR CURVED BUILDING BOARDS I GR lRODUClNG CONCRETE CEILINGS Walter Zimmerschied, 7 August-Siebert-Str., and Hans Ungemach, 9 August-Siebert-Str., both of Frankfurt am Main, Germany, and Willy Kaiser, deceased, late of Frankfurt am Main, Germany, by Berta Kaiser and Brigitte Kaiser, sole heiresses, both of 16 Myliusstrasse, Frankfurt am Main, Germany Filed Nov. 28, 1961, Ser. No. 156,193 Claims priority, application Germany Dec. 30, 1955 6 Claims. (Cl. 25131.5)

This invention relates in general to forms or liners and in particular to a new and useful form for the formation of concrete structural ceilings and the like which includes a trough-shaped liner having securing elements adapted to support the liner for the purpose of pouring concrete and the like thereover and to effect withdrawal of the liner and freeing from the concrete after forming.

The present application is a continuation-in-part of application Serial No. 630,952, filed December 27, 1956.

The present invention has particular application in connection with the formation of reinforced concrete ceilings where the concrete is to be formed completely around spaced beam members and to bridge between the members. With such constructions it is necessary that forms be placed between the beam supports for the purpose of carrying the concrete and permitting it to be distributed around the beam until the concrete has formed or hardfined. With prior art constructions great difliculty has been encountered in providing a form which may be anchored between the supporting beams and which will form a sufficiently rigid structure for the molding of the concrete between the beams and around the beams. Where securing devices are used with such forms, it is difficult to properly anchor these forms for the reception of the concrete and to permit easy removal thereof after the concrete has formed.

In accordance with the present invention, a troughshaped form or liner is provided of a selected dimension which is adapted to bridge the usual spacing between supporting or structunal reinforcing beams. The arrangement includes a scissor-like securing rod mechanism which comprises a pair of pivotally connected rod elements which are adapted to be positioned into a selected one of a plurality of vertically and laterally offset openings defined in the side wall of the trough-shaped liner. A feature of the invention is that the openings which are provided in the side walls of the liner permit adjustability of the form both in respect to the location of the supporting and fastening mechanism and in respect to the elevation of the liner above a flange portion of the supporting beam upon which the liner is adapted to be supported.

The fastening and supporting mechanism advantageously includes a pair of steel rod members which are pivotally connected by means of a removable or rupturable wire or belt connection at locations spaced slightly ofl center in respect to each of the rod elements. The rod elements include longer leg portions which extend from the pivotal connection in opposite directions and enter into a selected opening in the liner and are adapted to rest on a lower flange portion of a supporting or reinforcing beam over which the concrete is to be poured.

Opposite leg portions of the rod elements extend ou wardly in opposite directions from the pivotal connection and are of a length such that the flat ends thereof may be pressed upwardly against the walls of the troughshaped liner to force the walls in an outward direction against the flange of the reinforcing member. The ends of the liner are directed outwardly against the flanges of the opposite supporting members and are reinforced by 3,130,471 Patented Apr. 28, 1964 the rods so that they will hold the weight of the concrete to be poured thereon. For the purposes of permitting removal of the liner, the securing mechanism rods or bars are provided with openings or holes adjacent the ends which are positioned through the openings-of the side walls of the trough-shaped liner member. Bolts or wire securing devices are placed through these openings and they extend laterally to span the slot openings in the trough-shaped member so that when the liner is to be removed it will be impossible to free the bars from the liner without first pulling the side walls of the liner inwardly away from the formed concrete.

A feature of the construction is that the liner with the securing devices comprising the pivotal rods or bars may be inserted between supporting or reinforcing beams by resting the projecting ends of the rods directly on the flanges of the beams. In such a position, the bars are pivoted between the side walls of the liner underneath the top face thereof by a removable wire pivot connection and the interior legs of the bars are anchored in a straight line by inserting wires through openings provided at opposite ends of adjacent rods which align in the straight line collapsed position of the bars.

After the concrete is poured and allowed to harden, the liner may be removed from below the ceiling by means of a hook-shaped rod member which is adapted to be positioned about the rods at the location of the central pivotal connection and then pulled downwardly. Pulling downwardly at such location causes the scissorlike collapse of the rods at the center, the breaking of the holding wires adjacent the ends of the rods and the freeing of the interior support of the trough-shaped member by the interior leg portions. Further downward movement of the hook-shaped releasing member effects the pulling inwardly of the side walls of the trough-shaped member, due to the bolts which span the slots of the member on the exterior face thereof. Thereafter, the complete liner is freed from the concrete and moved downwardly out of position.

Accordingly, it is an object of this invention to provide an improved line-r construction for pouring concrete and similar materials.

A further object of the invention is to provide a liner of trough-shaped configuration having supporting and se curing means which include a pair of elongated rod members pivotally connected together intermediate their ends which include leg portions of greater length which extend outwardly from the pivotal connection in opposite directions into a slot provided in a side wall of the liner for resthlg on a supporting beam on each side of the liner and which further includes leg portions of shorter length which are adapted to be pushed against the side walls of the liner for holding the liner during the formation of the concrete.

A further object of the invention is to provide a scissorlike securing device for a mold liner which includes a pair of cooperative rod elements pivotally connected intermediate their lengths and having leg portions extending outwardly in opposite directions from the pivotal connection, each having one leg portion of slightly longer length than the other leg portion, the longer leg portions being adapted to extend through a liner and to be secured on the outer face of the liner for supporting purposes, the inner leg portions adapted to be directed against the inner face of the liner to direct the inner face outwardly for liner reinforcing purposes.

A further object of the invention is to provide a liner which may be used for the formation of concrete which includes a simple means for positioning the liner in association with supporting beams and for thereafter releasing the liner from the beams and the concrete after the concrete is formed.

A further object of the invention is to provide a liner construction'including fastening and reinforcing elements which is simple in designfrugged in construction and economical to manufacture.

The'various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming apart of this specification. For a betterunderstanding of'the invention, its operating advantages and specific objects attained by its use, reference should be had'to the accompanying drawings and 'descriptive matter in which there is illustrated and described apreferred embodiment of the invention.

In the drawings:

FIG. '1 is a fragmentary perspective view of a portion of a ceiling indicating spaced reinforcing or supporting beams witha liner constructed in accordance with the invention shown as it .is to be positioned therebetwe'en;

FIG. 2 is a transverse section through a portion of the ceiling after the concrete has been poured over the liner;

FIG. 3 is a fragmentary side elevation of the liner;

FIG. 4 is a perspective view of the underside of the ceiling indicating the manner of freeing the liner from the ceiling after the concrete has been poured; and

FIG. 5 is a view similar to FIG. 4 but indicating a liner after it has been removed from the ceiling.

Referring to the drawings in particular, the invention embodied therein includes a liner assembly generally designated which includes a trough-shaped form portion made ofa semi rigid material such as paperboard, fiber-board, plastic and the like, which includes a flattop portion 12 reinforced by lateral ribs 14 and side wall portions 16 and 18.

In accordance with the invention, each of the side Walls 16 and 18 includes a plurality of vertically and laterally oifset openings or slots 20 provided for receiving a combination liner supporting, reinforcing and releasing mechanism generally designated 22.

As best seen in FIG. 2, the mechanism 22 advantageously comprises a pair of rods .24 and 26 which are pivotally connected together by tie wire, bolts or similar members 28 intermediate their lengths. Each rod includes a longer leg portion 24a, 26a extending outwardly in opposite directions from the pivotal connection 30. The longer leg portions 24a and 2611 include ends or noses 24b and 26b, respectively, which extend through a selected slot 20 of theliner .12. After the noses 24b and 26b are positioned through the slots 20, a cross bolt or projection member 32 is positioned in an opening formed in the nose portion and it is of a length to span the width of the slots 20 to prevent removal of the nose portions from the position extending to the exterior of the liner.

The liner assembly 10 is completed when shorter leg portions 240 and 26c of the mechanism 22 are pushed upwardly to the solid line position indicated in FIG. 2 with all leg portions parallel. In sodoing extreme edges 24d and 26d of the leg portions 24c and 26c are forced against the interior faces of the wall portions 16 and 18 and direct .them outwardly from a dotted line position to the solid line position indicated in FIG. 2.

As indicated in FIG. 1, it is preferable to assemble two of the mechanisms 22 to the whole liner assembly 10 and to secure the rods 24 and 26 with the leg portions disposed parallel by means of fastening wire elements 33 which are positioned into openings 36 of each of the rod members which align when the leg portions are disposed parallel. The liner is then inserted between flanges 34 of adjacent cross beams 36, 36 and the nose portions 24b and 26b are positioned to rest on the flanges 34.

Concrete is then poured over the mold and over and around the reinforcing beams 36 to form a concrete form 38 as indicated in FIG. 2. In most instances, a reinforcing rod or members 10 are positioned over the flange portion 34 and one of them abuts against an inclined face of the noses 24b and 26b. The edges 24d and 26d of the mechanism 22 anchor the walls 16 and 18 in an outwardly extended position and insure that the concrete forms only above the flange and will not force these walls inwardly by the weight thereof.

A feature of the invention is that after the liner has served its function it may be easily removed from the concrete which has formed. For this purpose, releasing hook members 40 are manipulated from the ground level to position hooked ends 42 thereof over the pivotal location 30 of each of the securing mechanisms 22. In the embodiment illustrated, two such mechanisms are employed with each trough assembly 10. After the hook is positioned over the pivot 30 the member 40 is pulled downwardly as indicated in FIG. 4 to cause the Wire element 33 to be pulled out or severed and the mechanism to collapse scissor-like bringing the leg portions 240 and 26a to the dotted line position indicated in FIG. 2. This effects freeing of the interior faces of the'walls '16 and 18 and causes inward movement of the nose portions 24b and 26b. The inward movement'of the nose portions eifects displacement of the walls 16 and 18 from the solid line position indicated in FIG. 2 to the dotted line position. The side walls are thus freed from the concrete and further downward movement of the hooked rod members 40 causes release of the top face 12 and permits complete removal of the liner assembly and carrying by the hooked members 40 in the manner indicated in FIG. 5.

Thus, the invention provides a novel liner assembly including a mechanism which permits the support, the reinforcment and the subsequent release of the liner from its position between supporting or reinforcing beams. The device is very simple to use and the liner assembly 10 may be easily inserted in position for the receipt of concrete-between the reinforcing beams 36. After the con crete is formed, it is a simple matter to remove the liner from the ceiling by hooked members which pull the mechanism 22 at a central pivotal location to both free the liner and to permit its withdrawal downwardly.

While a specific embodiment of the invention has been shown and described in detail to illustrate the application of the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.

What is claimed is:

l. A liner construction for forming concrete between and around spaced supporting beams in a ceiling construction and the like comprising a trough-shaped liner having a top wall and two side walls adapted to be disposed between the supporting beams with the side walls extending downwardly, said side Walls each having a slot defined therein, and combination supporting, reinforcing and releasing means including a pair of bars pivotally con nected together intermediate their lengths each'having one leg portion extending outwardly from said pivot in a direction opposite to the similar leg portion of the other bar into a respective slot of the side wall of said troughshaped liner, means to secure said leg portion against withdrawal through such slot from the exterior of said side walls, said bars also including a second leg portion of a length so that when aligned with'said first leg portion of the other of said bars, it bears against the interior face of a respective side wall and to force it into an outwardly extending position and to reinforce it in such a positon for receiving concrete against the exterior face thereor.

2. A liner construction according to claim 1, wherein said first and second leg portions of opposite bars have openings adapted to align when said leg portions are positioned in alignment, and securing means extending through said openings to hold said bars in an aligned position for supporting said liner and reinforcing said side walls of said liner.

3. A liner construction according to claim 1, wherein said means to secure said bars against withdrawal through said slot includes a bolt, said first leg portion having an opening adjacent its end which extends through said slot and said bolt extending through said opening on the exterior of said side walls.

4. A liner construction according to claim 1, including a plurality of offset slots to permit adjustment of said liner on said supporting beams by the location of said combination supporting reinforcing and releasing means in a selected slot.

5. In combination with a liner construction for forming concrete between and around spaced supporting beams in a ceiling construction and the like comprising a troughshaped liner having a top wall and two side walls adapted to be disposed between the supporting beams with the side walls extending downwardly, said walls each having a slot defined therein, the improvement comprising combination supporting, reinforcing and releasing means including a pair of bars substantially equal in length pivotally connected together with the pivots being located at a position so that said bars each include a long leg portion terminating in bearing extensions which are adapted to extend through one of the slots of the liner and to rest on the 20 wedged against a side wall of the liner, said pivotable connection being such to permit said bars to be pivoted to lie with their axes substantially parallel and with the bearing extensions formed on the longer legs extending outwardly in opposite directions for disposition within the slots of the liner and with the abutment face of the shorter leg portions extending outwardly in opposite directions for disposition against the respective liner side Walls.

6. In a liner construction according to claim 5, wherein each of said bars includes an opening defined therein which are adapted to align when said bars are arranged to extend substantially parallel, said openings being provided to receive securing means therethrough when aligned to prevent buckling of said bars.

References Cited in the file of this patent UNITED STATES PATENTS 1,789,049 Nelson Jan. 13, 1931 1,790,135 Culthberson Jan. 27, 1931 FOREIGN PATENTS 77,294 Austria July 25, 1919 580,842 France Sept. 25, 1924 

1. A LINER CONSTRUCTION FOR FORMING CONCRETE BETWEEN AND AROUND SPACED SUPPORTING BEAMS IN A CEILING CONSTRUCTION AND THE LIKE COMPRISING A TROUGH-SHAPED LINER HAVING A TOP WALL AND TWO SIDE WALLS ADAPTED TO BE DISPOSED BETWEEN THE SUPPORTING BEAMS WITH THE SIDE WALLS EXTENDING DOWNWARDLY, SAID SIDE WALLS EACH HAVING A SLOT DEFINED THEREIN, AND COMBINATION SUPPORTING, REINFORCING AND RELEASING MEANS INCLUDING A PAIR OF BARS PIVOTALLY CONNECTED TOGETHER INTERMEDIATE THEIR LENGTHS EACH HAVING ONE LEG PORTION EXTENDING OUTWARDLY FROM SAID PIVOT IN A DIRECTION OPPOSITE TO THE SIMILAR LEG PORTION OF THE OTHER BAR INTO A RESPECTIVE SLOT OF THE SIDE WALL OF SAID TROUGHSHAPED LINER, MEANS TO SECURE SAID LEG PORTION AGAINST WITHDRAWAL THROUGH SUCH SLOT FROM THE EXTERIOR OF SAID SIDE WALLS, SAID BARS ALSO INCLUDING A SECOND LEG PORTION OF A LENGTH SO THAT WHEN ALIGNED WITH SAID FIRST LEG PORTION OF THE OTHER OF SAID BARS, IT BEARS AGAINST THE INTERIOR FACE OF A RESPECTIVE SIDE WALL AND TO FORCE IT INTO AN OUTWARDLY EXTENDING POSITION AND TO REINFORCE IT IN SUCH A POSITION FOR RECEIVING CONCRETE AGAINST THE EXTERIOR FACE THEREOF. 